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/* Any copyright is dedicated to the Public Domain.
export class DocShellHelpersParent extends JSWindowActorParent {
static eventListener;
// These static variables should be set when registering the actor
// (currently doPageNavigation in docshell_helpers.js).
static eventsToListenFor;
static observers;
constructor() {
super();
}
receiveMessage({ name, data }) {
if (name == "docshell_helpers:event") {
let { event, originalTargetIsHTMLDocument } = data;
if (this.constructor.eventsToListenFor.includes(event.type)) {
this.constructor.eventListener(event, originalTargetIsHTMLDocument);
}
} else if (name == "docshell_helpers:observe") {
let { topic } = data;
this.constructor.observers.get(topic).call();
}
}
}
export class DocShellHelpersChild extends JSWindowActorChild {
constructor() {
super();
}
receiveMessage({ name }) {
if (name == "docshell_helpers:preventBFCache") {
// Add an RTCPeerConnection to prevent the page from being bfcached.
let win = this.contentWindow;
win.blockBFCache = new win.RTCPeerConnection();
}
}
handleEvent(event) {
if (
Document.isInstance(event.originalTarget) &&
event.originalTarget.isInitialDocument
) {
dump(`TEST: ignoring a ${event.type} event for an initial about:blank\n`);
return;
}
this.sendAsyncMessage("docshell_helpers:event", {
event: {
type: event.type,
persisted: event.persisted,
originalTarget: {
title: event.originalTarget.title,
location: event.originalTarget.location.href,
visibilityState: event.originalTarget.visibilityState,
hidden: event.originalTarget.hidden,
},
},
originalTargetIsHTMLDocument: HTMLDocument.isInstance(
event.originalTarget
),
});
}
observe(subject, topic) {
if (Window.isInstance(subject) && subject.document.isInitialDocument) {
dump(`TEST: ignoring a topic notification for an initial about:blank\n`);
return;
}
this.sendAsyncMessage("docshell_helpers:observe", { topic });
}
}